Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1325674 | Journal of Organometallic Chemistry | 2013 | 7 Pages |
•A family of new homoleptic titanium alkoxides has been prepared.•The existence of monomer–dimer equilibrium is proposed.•The structure of the complexes depends on the crowding effect of the alkoxo ligands.•Titanium compounds have been studied in the epoxidation reaction of 1-octene with EHBP.
A new series of titanium alkoxo complexes [Ti(OR)4] (1–8) have been synthesized by the alcoholysis reaction of Ti(OiPr)4 with the corresponding alcohol (ROH = Adamantanol, (1R,2S,5R)-(−)-menthol, 1,2:5,6-di-O-isopropylidene-α-D-glucofuranose, 1,2:3,4-di-O-isopropylidene-α-D-galactopyranose, (1R)-(−)-myrtenol, 1,2:5,6-Di-O-cyclohexylidene-α-D-glucofuranose, (1S-endo)-(−)-borneol and (−)-sclareol). These homoleptic alkoxo titanium (IV) complexes have been characterized by spectroscopic and electrochemical techniques. In addition, they have been tested in the epoxidation reaction of 1-octene with ethylbenzene hydroperoxide as oxidant; obtaining yields of up to 90% and selectivity values of 50%. The conversion profile of EBHP was found to depend on the amount of titanium and on the chemical environment of titanium sites.
Graphical abstractA new series of homoleptic titanium alkoxo complexes have been synthesized and characterized by spectroscopic and electrochemical techniques. They have been tested in the epoxidation reaction of 1-octene with ethylbenzene hydroperoxide. The conversion profile of EBHP was found to depend on the amount of titanium and on the chemical environment of titanium sites.Figure optionsDownload full-size imageDownload as PowerPoint slide